Means for operating elevator gates



G. P. P. J. DROLET.

MEANS FOR OPERATING ELEVATOR GATES. APPLICATION FILED JAN. 11, 1920.

1,407,392. Patented Feb. 21,1222.

I If 9 E 7 Li 3 E i s if? E m rarest MEANS FOR OPERATING ELEVATOR GATES.

Specification of Letters Patent.

Patented Feb. 21, 1222.

Application filed January 17, 1920. Serial No. 352,237.

T all whom it may concern:

Be it known that I, GAUnIosn PIERRE ALEXANDRE PRIME J OSEPH DROLET, a subject of the King of Great Britain, and residing at 206 Rue du Pont, in the city ofQuebec, in the Province of Quebec, in the Dominion of Canada, have invented a new and useful Means'for Operating Elevator Gates, of which the following is the specification.

The invention relates to means for operating elevator gates, as described in the pres ent specification and illustrated in the accompanying drawings that form part of the same.

'The invention consists essentially in the novel means employed, whereby the raising and lowering of the elevator effects the automatic operation of the gate.

The objects of the invention are to provide a very simple and eflicient device that will be positive in its movements and automatic throughout its operation; to insure convenience for employees and others in handling freight and heavy loads in raising and lowering mechanisms; and generally to provide a serviceable, durable and economical means for automatically operating the elevator gate.

In the drawings, Figure 1 is a perspective view, showing the application of the gate operating means to a freight elevator.

Figure 2 is a horizontal sectional View, showing the cable drum and the rack and pinion operating mechanism.

Figure 3 is a longitudinal elevation of the operating mechanism.

Figure 4; is a perspective detail of a retaining roller.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, the platform 1 is here shown with the uprights 2 and 3 and cross beam 4 as forming thecar or lift operating between the posts 5.

The gate frame 6 is here shown as broken away to disclose parts of the invention. One side of the gate frame 6 is longitudinally recessed for the counterweight 7 said counterweight being attached to the cable 8. The cable 8 passes over the pulleys 9 and 10, which are journalled in the upper section of the gate frame 6, said cable continuing over the pulley 10 and downwardly and at its lower end being attached to the block 11 secured to the gate 12 at its lower slat 13.

The slat 13 and the slat 1% are rigidly secured to a leg 15 at each end and the slat 14 is slotted at 16 and connected by the collapsing bars 17 to the upper slats 18, which are also slotted and joined by the bars 19.

The counterweight 7 is very slightly hghter in weight than the gate 12, that is to say, the gate 12 just overbalances the said counterweight, so that the normal position of the gate is its extended condition, closing the opening to the car, but the counterweight so nearly balances the gate in weight that it is very easy to open, and this opening mechanism is formed of the cable 20 that extends upwardly from the block 11 and passes over the pulleys 21 and 22 journalled in the gate frame and under the pulley 23 to the drum 24, on which said cable 20 winds in opening operations.

The drum 24 is fixedly mounted on the shaft 25, which is journalled in the bar 26 supported from a post 5 and the gate frame 6. The pinion 27 is also fixedly mounted on the shaft and this pinion coacts with the rack 28, which is carried by the spindle 29 of the roller 30, said spindle extending through the slot 31 in the bar 26. The rack 28 is held to engagement with the pinion 27 by the roller 32, which engages the back of said rack.

The cam bar 33 engages the roller and is formed of a middle vertical section 34 and the inclined top and bottom sections 35 and 36, so that when the elevator is in operation, the roller 30 travels along an inclined section to the vertical section and this moves said roller 30 along in the slot 31, and as the rack 28 is carried by the roller 30, said rack also moves with said roller.

The pinion 27 coacting with the rack turns the shaft 25 and this rotates the drum 24, which winds up the cable 20 and consequently lifts the lower slats of the gate and collapses the upper slats, so that the gate is well open by the time the roller 30 reaches the middle section 34; of the-cam bar. The cam bar 33 is made in angle form so that the angle section of the bar forms a retaining wall for the roller 30.

Various changes may be made in the construction without departing from the spirit of the invention, and so long as these changes are within the scope of the claim for novelty following, the protection accorded shall not be invalidated.

What I claim is f In means for operating elevator gates, a cable and pulleys, a gate suspended therea from, a flanged bar adapted to be secured through the end flanges to the gate post and main guide beam and having adjacent to the one end a boss for a pivot pin fastening and intermediately, a drum shaft orifice and a roller orifice and a slot forming a roller track extending towards the other end and terminating adjacent thereto, a pivot pin secured in said boss and carrying a pulley,

'- a drum shaft secured in said shaft orifice,

GAUDKOSE PIERRE ALEXANDRE PRIME JOSEPH DROLET. 

